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merumerutho / XMXDS

A NDS homebrew to play XM and MOD modules on Nintendo DS built with libgba and libxm7
MIT License
3 stars 0 forks source link

Playback of short length loops is off-tune #1

Open merumerutho opened 1 year ago

merumerutho commented 1 year ago

Instruments based on looping of samples of short length (less than 100 samples more or less) are a common practice in chiptune.

However, when played back by libxm7 they result in off-tune sounds. The bug can probably be traced back to the inaccuracies related to short waveforms being imprecise in relation to something like timer callbacks or similar.

merumerutho commented 1 year ago

Update: problem seems to be restricted to cases where len(sample) is around 50 or less